Detachable covering for abrading drums



April' 18, 1950 N. EMMONS' ET'AL 2,504,923

DETACHABLE COVERING FOR ABRADING DRUMS Filed Aug. '7, 1948 FIG. 2

IN VENTOR. flRTHuR N. E MM olv's figs TpF N. E NLUND i atenteri Apr. i8,

1 salesmen-E esteem-e FOR ABR-ADING;

DRUMS Arthu lu or NEW York ssesses maintainers-14s i a v v 17:6"a'dtacheblejresiliiiit ng particularly [for y 'Tllese'hyiiii- This ' clued-w resilien ee er: rtli lik, '"to"forin*ayieldmg g ahdpalper. U

It ornes'neeessar rs re raee rnryr 7 iodi al y. n The "conventional" practise nefitiymeat the backing material onto 'the abradihg dfumi In order to replace the material, this requires removal of the roll from the :machine, renibvingthe material from the drum, .and aiilxing a new covering on the drum. This :procedure usually requires the drum to be re- :turned to the ,manufaeturer Arrangements 3 have been developedto demount, or detachably the backing materialto the drum with'the 1% heirs 'oved oni the machine.

"oving the drum fr :terial with more case and convenience than like :arrangements now in use. The invention is of .such structure that it can be readily used on conventional abrading drums now in use and functions in a manner to smoothly and evenly -contact the covering on the entire peripheral -surface of the drum.

The invention consists in the novel features :and in the combinations and constructions herei'i'nafter set forth and claimed.

In describing this invention, reference is had ito the accompanying drawings in which like characters designate corresponding parts in all ithe views.

Figure 1 is a side elevational view of an abrad- :ihg drum embodying our invention.

Figure 2 is an end elevational view of the drum.

Figure 3 is a view, similar to Figure 1, showing the opposite side of the drum.

Figure 4 is a perspective view of the detachable covering with a portion of the resilient material removed.

Figure 5 is a fragmentary sectional view of the drum taken on line 5-5, Figure 3.

These abrading drums consist of a cylindrical member ID mounted on end plates H aflixed to icharrangements hdtlf in fise a're'iof a shaft 12 extending" through' the drum and bein s ita bly jourfia'lie'd ifi-th majhine in-wh'ich the is used. V

Thee drums are forrridfon one side with a g e w tness-unread usuan anglers tli axis sr the slot extends through the cylindrical memberfi'fl and usually extends a distane 'tothe ndplates e'Fi'g iii t ssiotis to dr' tlief's' eft he s "are forme with upoiirotan n of 5 6f the abrading mater to the sldt thus messenger aboiitjthe roll, the-arrangement serving as a means' fonrieta'chably' seciiring'the abrading sheet on the roll. A structure of this type is disclosed in Patent No. 1,836,367, issued to Arthur N. Emmons, December 15, 1931. The

resilient cover herein disclosed is intended for use particularly with that type of abrading drum. The cover consists of a pair of semi-cylindrical members 20 formed of rigid sheet material, such.

as sheet metal. These members are shaped and adapted to encircle the drum. Like ends of the members are formed with inwardly extending flanges 22, these flanges being positioned in the slot for receiving the ends of the abrading sheet. The opposite ends of the members 20 have secured thereto bars 23, the ends of which extend laterally beyond the sides of the members 2!) and are folded back upon themselves to form projections in the form of eyes 24, see Figures 4 and 5. The bars 23 are secured to the members 20 by rivets, spot welding, or the like.

The side of the drum, opposite to the slot referred to, is formed with a second slot for the reception of the bars 23, the outer ends of this slot being recessed to receive the extra thickness indicated at 25 resulting from the eye formations 24.

A covering 26 of resilient material, such as sponge rubber, is fixedly secured to the outer surface of each of the members 20, as by being cemented thereto.

In use, the members 20 are placed upon the cylindrical portion ll] of the drum with the flanges 22 positioned in the abrading sheet re ceiving slot. The opposite end of the members are drawn circumferentially about the surface of the drum, as by screws 21 extending through the eye portions 24 of bars 23, and which are provided with tightening nuts 28. In this manner, the covering members are contracted tightly about the surface of the drum with the flanges 22 arranged in spaced relation to form a slot or opening 29 to receive the end portions l5 of the abrading sheet. These end portions of the member 29 may be additionally secured to the drum, as by screws 30.

It will be observed that the members 20 may be quickly and conveniently removed from the drum without removing the same. from the abrading machine, and the only tool necessary to effect such removal is a common screw-driver. The covering may be likewise quickly replaced with new cover members and due to the fact that the flanges 22 and the bars 23 are positioned in slots formed in the peripheral surface of the drum, there is no possibility of the covering member sliding or creeping on the drum during the abrading operation. The members 29 are formed of relatively thin sheet steel, or the like, and these members plus the bars 23 add no appreciable weight to the abrading drum, nor do they have any appreciable effect upon the elements of the drum.

What we claim is:

1. A detachable cover for an abrading drum having a slot formed in the peripheral surface thereof and extending lengthwise of the drum, comprising a pair of semi-cylindrical members formed of rigid sheet material adapted to encircle the drum, confronting ends of said members having flanges arranged in spaced apart relation in said slot, tightening means cooperable with the opposite ends of said members to draw said members circumferentially around the drum in contracted relation thereto, and a layer of resilient sheet material fixed to the outer surface of each of said members.

2. A detachable covering for an abrading drum having a slot formed in the peripheral surface thereof and extending lengthwise of the drum, comprising a pair of semi-cylindrical members formed of rigid sheet material and adapted to encircle the drum, a resilient covering secured to the outer surface of each of said members, means cooperable to fixedly secure like ends of said members to the drum in registration with the edges of said slot, and tightening means cooperable with the opposite ends of said members to tension the members circumferentially about the .drum.

3. A detachable covering for an abrading drum having slots formed in diametrically opposite sides of the peripheral surface thereof and extending lengthwise of the drum, comprising a pair of semi-cylindrical sheet metal members adapted to encircle the drum, like ends of said members having flanges arranged in one of said slots, the opposite ends of said members having bars afilxed thereto and positioned in said other slot, said bars projecting beyond the sides of said members, and screw means cooperable with said projecting portions to draw said members circumferentially about the drum, and a covering of resilient material aifixed to the outer surface of each of said members.

ARTHUR N. EMMONS. GUSTAF N. ENLUND.

REFERENCES CITED The following references are of record in the file of thispatent:

UNITED STATES PATENTS Number Name Date 2,173,864 Sherman et a1. Sept. 26, 1939 2,197,917 Barton Apr. 23, 1940 2,207,439 Monjar July 9, 1940 2,437,958 Holt Mar. 16. 1948 

